A simple, reliable 2piece airlock designed for homebrewing and smallbatch fermentation. This twinbubble air lock with cap and grommet provides a clear visual indicator of activity while allowing carbon dioxide to escape and helping protect your ferment from oxygen and contaminants. Key benefits Protects your ferment: creates a oneway escape for CO2 while limiting air and airborne microbes from entering the vessel. Visual fermentation indicator: twin bubble design makes activity easy to monitor at a glance. Easy to use and maintain: twopiece construction is simple to assemble, disassemble and clean between batches. Versatile fit: includes a grommet and cap for secure installation on common homebrew fermenters and lids. Features and attributes Design: 2piece, twinbubble airlock that snaps together quickly and stays sealed during fermentation. Included components: airlock body, removable cap, and grommet for creating a tight seal in fermenter lids or bungs. Functionality: oneway gas release with water barrier; bubbles show CO2 release and fermentation progress. Compatibility: intended for homebrew use with beer and wine fermentation and other smallbatch ferments where a grommet or bung is used. Maintenance: simple disassembly for rinsing and sanitizing between uses. Performance: provides a visible, leakresistant path for gas escape without exposing fermenting liquid to outside air. Typical use cases Beer fermentation: install in a bucket lid or bunged carboy to vent CO2 during primary and secondary fermentation while monitoring activity by bubble rate. Wine making: use on small wine batches to allow carbon dioxide to escape during fermentation and protect the must from oxidation and contamination. Smallbatch and experimental ferments: suitable for mead, cider or other home fermentations that require a compact, reliable airlock solution with a grommet seal. What to expect A straightforward, compact airlock assembly that makes it easy to set up and monitor fermentation. A secure grommet fit that helps maintain a sanitary environment for your ferment. Repeatable, reusable performance when cleaned and sanitized between uses. Compatibility note Designed for homebrewing setups that accept a grommet or bungmounted airlock. Confirm your fermenter has a compatible opening or grommet before installation. Simple, functional and practical — this twin bubble 2piece airlock with cap and grommet gives you an easy way to protect and monitor fermentation for beer, wine and other homebrew projects.